Patents by Inventor Erkki Oksman

Erkki Oksman has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4636181
    Abstract: The invention relates to a conveyor chain, which comprises chain links (1) consisting of a barrel portion (2) and elongated side bars (3,4), the first ends of which are attached to the ends of the barrel, whereby the distance between the free ends of the side bars (3,4) corresponds to the length of the barrel (2) including the side bars attached to it. In order to enable the assembly of a chain of identical, mutually similar parts without tools, the surfaces located opposite each other at the free ends of the bars (3,4) of the chain links are provided with studs (5,6), the outer diameter of which corresponds to the inner diameter of the barrel (2) and the elasticity of the bar (3,4) material is such that the bars can be spread from each other to such an extent as to enable the insertion of the studs (5,6) of one chain link into the barrel (2) of another chain link.
    Type: Grant
    Filed: June 6, 1985
    Date of Patent: January 13, 1987
    Assignee: Oy Nokia Ab
    Inventors: Esko Savolainen, Tuomo Laukkarinen, Arto Lehto, Erkki Oksman, Unto Eilamo